<template>
  <div>
    <el-upload
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      style="display: none"
      ref="upload"
      multiple
      v-if="this.type == 'url'"
    >
    </el-upload>
    <div class="editor" ref="editor" :style="styles" v-loading="uploading" element-loading-text="文件上传中"></div>
  </div>
</template>

<script>
import Quill from "quill";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";
import { getToken } from "@/utils/auth";

export default {
  name: "Editor",
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false,
    },
    /* 上传文件大小限制(MB) */
    fileSize: {
      type: Number,
      default: 5,
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: "url",
    },// 上传到七牛云
    qiniu:{
      type:Boolean,
      default: false
    }
  },
  data() {
    let uri = "/common/upload";
    if(this.qiniu){
      uri = "/common/qiniu";
    }
    return {
      uploading: false,
      uploadUrl: process.env.VUE_APP_BASE_API + uri, // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken()
      },
      Quill: null,
      currentValue: "",
      options: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          // 工具栏配置
          toolbar: [
            ["bold", "italic", "underline", "strike"],       // 加粗 斜体 下划线 删除线
            ["blockquote", "code-block"],                    // 引用  代码块
            [{ list: "ordered" }, { list: "bullet" }],       // 有序、无序列表
            [{ indent: "-1" }, { indent: "+1" }],            // 缩进
            [{ size: ["small", false, "large", "huge"] }],   // 字体大小
            [{ header: [1, 2, 3, 4, 5, 6, false] }],         // 标题
            [{ color: [] }, { background: [] }],             // 字体颜色、字体背景颜色
            [{ align: [] }],                                 // 对齐方式
            ["clean"],                                       // 清除文本格式
            ["link", "image", "video"]                       // 链接、图片、视频
          ],
        },
        placeholder: "请输入内容",
        readOnly: this.readOnly,
      },
    };
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    },
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          this.currentValue = val === null ? "" : val;
          if (this.Quill) {
            this.Quill.pasteHTML(this.currentValue);
          }
        }
	      this.resetIframeSize();
      },
      immediate: true,
    },
		  '$store.state.app.appSize': function(newAppSize){
			   this.resetIframeSize();
		  }
  },
  mounted() {
    this.init();
  },
  beforeDestroy() {
    this.Quill = null;
    this.uploading = false;
  },
  methods: {
    init() {
      const editor = this.$refs.editor;
      this.Quill = new Quill(editor, this.options);
      // 如果设置了上传地址则自定义图片上传事件
      if (this.type == 'url') {
        let toolbar = this.Quill.getModule("toolbar");
        toolbar.addHandler("image", (value) => {
										if (value) {
            this.$refs.upload.$children[0].$refs.input.click();
          } else {
            this.quill.format("image", false);
          }
        });
      }
			this.Quill.disable();
      this.Quill.pasteHTML(this.currentValue);
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML;
        const text = this.Quill.getText();
        const quill = this.Quill;
        this.currentValue = html;
        this.$emit("input", html);
        this.$emit("on-change", { html, text, quill });
      });
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        this.$emit("on-text-change", delta, oldDelta, source);
      });
      this.Quill.on("selection-change", (range, oldRange, source) => {
        this.$emit("on-selection-change", range, oldRange, source);
      });
      this.Quill.on("editor-change", (eventName, ...args) => {
		      // 获取编辑器当前的内容
		      const delta = this.Quill.getContents();

		      // 检查是否有 embed 类型的操作
		      const ops = delta.ops;
		      for (let i = 0; i < ops.length; i++) {
			      const op = ops[i];
			      if (op.insert && op.insert.video) {
				      let video = op.insert.video;
				      if(/(<iframe[^>]+>)/.test(video)){
					      video = video.replace(/^.*?src=['"]([^'"]+)?['"].*$/i, "$1");

					      op.insert.video = video;
					      this.Quill.setContents(delta);
					      break;
				      }

			      }
		      }
        this.$emit("on-editor-change", eventName, ...args);
      });

      setTimeout(() => {
        this.Quill.enable();
        editor.querySelector(".ql-editor").style.minHeight = `${this.minHeight}px`;
      }, 1000)

    },
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
		    const type = ["image/jpeg", "image/jpg", "image/png", "image/gif", "image/svg", "image/webp"];
		    const isJPG = type.includes(file.type);
		    // 检验文件格式
		    if (!isJPG) {
			     this.$message.error(`图片格式错误!`);
			     return false;
		    }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      if(!this.uploading){
        this.uploading = true;
      }
      return true;
    },
    handleUploadSuccess(response, file, fileList) {
      let list = fileList.filter(item => !item.response);
      if(list.length == 0){

        this.uploading = false;
        // 获取富文本组件实例
        let quill = this.Quill;

        fileList.forEach(item => {
          let res = item.response;
          // 如果上传成功
          if (res.fileName) {
            let imageUrl = this.qiniu ? res.url : (process.env.VUE_APP_BASE_API + res.fileName)
            // 获取光标所在位置
            let length = quill.getSelection().index;
            // 插入图片  res.url为服务器返回的图片地址
            quill.insertEmbed(length, "image", imageUrl);
            // 调整光标到最后
            quill.setSelection(length + 1);
          } else {
            this.$message.error("图片插入失败");
          }
        });


        this.$refs.upload.clearFiles();
      }
    },
    handleUploadError() {
      this.$message.error("图片插入失败");
    },
    /**
      * 重置iframe 宽度
      */
    resetIframeSize(){
      if(this.$refs.editor){
        let container = this.$refs.editor.children[0];
        let containerStyle = window.getComputedStyle(container);

        let iframes = container.querySelectorAll("iframe");
        for(let i = 0; i< iframes.length; i++){
          let iframe = iframes[i];
          let iframeWidth =  iframe.dataset.width;
          let iframeHeight = iframe.dataset.height;
          if(!iframeWidth || !iframeHeight){
            iframeWidth = iframe.scrollWidth;
            iframeHeight =  iframe.scrollHeight;
            iframe.dataset.width = iframeWidth;
            iframe.dataset.height = iframeHeight;
          }

          let width = container.clientWidth - parseFloat(containerStyle.paddingLeft) - parseFloat(containerStyle.paddingRight);
          let height = Math.floor(width * iframeHeight / iframeWidth);
          iframe.style.width = width + "px";
          iframe.style.height = height + "px";

        }
      }
    }
  },
};
</script>

<style>
.editor, .ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>
